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10PCS 0.3mm to 1.2mm PCB Mini Drill Bit Tungsten Steel Carbide for Print Circuit Board CNC Drill Bit D3, Find Details and Price about Solid Carbide Drill PCB Micro Drill Set from 10PCS 0.3mm to 1.2mm PCB Mini Drill Bit Tungsten Steel Carbide for Print Circuit Board CNC Drill Bit D3 - Shenzhen Alloytools Technologies Co., Ltd.